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PHP String Reference : Replace the characters "world" in the string "Hello world!" with "Peter"
The str_replace() function replaces some characters with some other characters in a string.
This function works by the following rules:
| Parameter | Description |
|---|---|
| find | Required. Specifies the value to find |
| replace | Required. Specifies the value to replace the value in find |
| string | Required. Specifies the string to be searched |
| count | Optional. A variable that counts the number of replacements |
| Return Value: | Returns a string or an array with the replaced values |
|---|---|
| PHP Version: | 4+ |
| Changelog: | The count parameter was added in PHP 5.0 Before PHP 4.3.3, this function experienced trouble when using arrays as both find and replace parameters, which caused empty find indexes to be skipped without advancing the internal pointer on the replace array. Newer versions will not have this problem. As of PHP 4.0.5, most of the parameters can now be an array |
Using str_replace() with an array and a count variable:
<?php
$arr = array("blue","red","green","yellow");
print_r(str_replace("red","pink",$arr,$i));
echo "Replacements: $i";
?>
Using str_replace() with fewer elements in replace than find:
<?php
$find = array("Hello","world");
$replace = array("B");
$arr = array("Hello","world","!");
print_r(str_replace($find,$replace,$arr));
?>
❮ PHP String Reference